Patent US2765242A successfully refreshed from Google Patents.
US2765242A
Expired / Lapsed
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Process of making reinforced silica gel and esterified silica gel
Assignee: EIDP Inc
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Filing: 1952-02-29
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Granted: 1956-10-02
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Expires: 1972-02-29
Abstract
No abstract record available.
Inventors
- 👤 Guy B Alexander
- 👤 Edward C Broge
- 👤 Ralph K Her
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:16
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C01B33/157; C01B33/158
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN A PROCESS FOR MAKING A REINFORCED SILICA GEL FROM A SILICA GEL HAVING A SURFACE AREA OF FROM 5 TO 100 SQ. METERS PER MILLILITER OF GEL VOLUME AND A CONCENTRATION OF 3 TO 30 GRAMS SIO2 PER 100 MILLILITERS OF GEL VOLUME, THE STEP COMPRISING HEATING THE GEL IN WATER AT A PH OF FROM 3 TO 10.7 AND A TEMPERATURE OF 80 TO 250* C. UNTIL THE SPECIFIC SURFACE AREA OF THE GEL HAS BEEN REDUCED BY FROM 10 TO 50 PER CENT, AND DRYING THE PRODUCT FROM A LIQUID MEDIUM.
Claim 2
Dependent Claim
94 words
IN A PROCESS FOR MAKING A REINFORCED SILICA GEL FROM A SILICA GEL HAVING A SURFACE AREA OF FROM 5 TO 100 SQ. METERS PER MILLILITER OF GEL VOLUME AND A CONCENTRATION OF 3 TO 30 GRAMS SIO2 PER 100 MILLILITERS OF GEL VOLUME, THE STEP COMPRISING HEATING THE GEL IN WATER AT A PH OF FROM 3 TO 10.7 AND A TEMPERATURE OF 80 TO 250* C. UNTIL THE SPECIFIC SURFACE AREA OF THE GEL HAS BEEN REDUCED BY FROM 10 TO 50 PER CENT, AND DRYING THE PRODUCT FROM A LIQUID MEDIUM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |